(19)

(11)

EP 0 986 764 A2

(12)

(88) Date of publication A3: 18.11.1999 (43) Date of publication: 22.03.2000 Bulletin 2000/12 (21) Application number: 99906404.1 (22) Date of filing: 16.03.1999

(51) International Patent Classification (IPC)7: G01S 5/14 (86) International application number: PCT/IB9900/443 (87) International publication number: WO 9950/685 (07.10.1999 Gazette 1999/40)

(84) Designated Contracting States: DE ES FR GB IT (30) Priority: 31.03.1998 GB 9806785 22.10.1998 GB 9823045 (71) Applicant: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL)	(72) Inventor: WHIGHT, Kenneth, R. NL-5656 AA Eindhoven (NL) (74) Representative: Tangena, Antonius Gerardus  Philips Electronics UK Ltd.,Cross Oak Lane Red Hill,Surrey RH1 5HA Red Hill,Surrey RH1 5HA (GB)